...give everyone a bit o' time to respond, eh?

It sounds like you've got a good setup in mind. I once saw a pro-grow in Calgary that was using an aeroponics setup very similar to what you have described. Plants were arranged on three pvc six or eight inch pipes, all slightly slanted to run off to the res.

My only suggestion to what you've posted so far would be to add drip/spray emitters between each plant, and get a good timer so that you can set the on/off misting cycle to something very short. Make sure that you have enough slope in your pipes so that water doesn't stand, but I'm sure you're already on top o' that.

As far as yields went, not sure exactly what quantity per plant my Calgary friend was getting, but his stuph was the absolute bomb for quality. He was using a single 1000w HPS in the middle of the room, and two 600w MH beside it. No light movers, but it was FREAKIN' bright in there...

The other suggestion would be to put up some pix / drawings, so that we can get a better idea of what you're planning

And have patience, young Jedi